Dredge-cutter.



J. F. BROWN.

DREDGE CUTTER.

APPLICATIQN FILED MAY 3l, Isls.

Patented Apr. 3, 1917.

2 SHEETS-SHEET l.

1. F. BROWN.

DREDGE CUTTER.

APPLICATION HLED MAY 31.1916.

Patented Apr. 3., 1917.

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DREDG-E-CUTTER.

Specification of Letters Patent.

Patented Apr. 3, 1917.

Application led May 31, 1916. Serial No. 100,898.

To all whom t may concern:

Be it known that I, JAMES FISHBURN BROWN, a subject of the King of Great Britain, residing at Shirehampton, Bristol, England, have invented new and useful Im? provements in Dredge-Cutters, of which the following is a specification.

This invention relates to dredge cutters and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide a cutter especially adapted to be used for marine dredging, the parts being so arranged that when the cutting blades are rotated about the axis upon which they are mounted, they may encounter the bottom and reduce the same into comparatively small bits or particles, which may be readily sucked up together with a quantity of water, and passed through a pipe line to the shore or a receiving scow.

In the accompanying` drawings Figure 1 is a side elevation of the cutter.

Fig. 2 is a top plan view of the same.

Fig. 8 is a longitudinal sectional view of part of the same.

Fig. l is a transverse sectional View of the same.

Fig. 5 is a perspective view of one of the cutting blades.

The frame 1 upon which the cutter is v mounted may be of any usual form or pattern, and a suction pipe 2 is supported at the lower side of the said frame and is disposed along the median longitudinal line thereof. A shaft 3 is journaled for rotation at the upper portion of the frame 1 and any suitable means may be provided for turning the shaft. Sprocket wheels t are mounted upon the shaft 3.

An axle 5 is journaled for rotation at the end portion of the frame 1 and the said axle is provided at its ends with disks 6. The said disks are integral with the axle. The axle 5 from a point midway between its ends gradually increases in diameter as at 7 toward the disks 6 and the said increase or addition of material serves as means for efficiently bracing the disks in position with relation to the axle. Trunnions 8 are `provided at the ends of the axler and are concentrically positioned with relation to the disks 6. The said trunnions are in the form of a shaft passing through the axle and fixed to the same. The said trunnions are journaled in the frame 1 in any suitable manner. Sprocket wheels 9 are mounted upon the trunnions 8 adjacent the outer sides of the disks 6 and at the ends of the axle, and sprocket chains 10 are trained around the sprocket wheels l and 9 and serve as means for transmitting rotary movement from the shaft 3 tothe axle 5. Y

The disks 6 are provided at their inner sides and at their peripheral portions with radially disposed recesses 11 which snugly receive the end portions of cutter blades 12. Bolts1 or other suitable securing devices 13 pass transversely through the end portions of the blades, and the peripheral portions of the disks 6 and serve as means for holding the blades in position with relation to the said disks. rlhe edges of the end portions of the blades 12 bear against the walls of the recesses 11, consequently the walls of the recesses serve as means for bracing the cutter blades in position with relation to the disks and relieve the bolts or securing devices 13 from strain when the cutter is in operation.

The cutter blades 12 are of peculiar configuration. The said blades are convex longitudinally and the said blades at their forward or cutting edges are disposed over the peripheries of the disks 6, as at 14. The portions of the blades which are disposed over the disks converge toward each other from the forward to the rear edges of the blades, so that the said blades, when in operation, will cut the material from the path of movement of the disks, thereby permitting the disks to sink in the excavation and the material so out is directed by the converging side portions of the blades to the `space between the disks 6, where it may be sucked up with a sufficient quantity of water through the suction pipe 2. Cutting teeth 15 may be mounted upon the forward por tions of the blades 12 at points between the ends of the cutting edges, and may be removed from the blades when desired for sharpening or other purposes.

Fenders 16 are mounted upon the frame 1 and the edge portions of the said fenders are disposed over the upper parts of the sprocket wheels 9 and they serve as means for preventing material from lodging between the sprocket wheels and chains 10 as the said chains move over the upper portions of the said sprocket wheels.

From the above description taken in conlli) '- the said pipe together Witha sufeient quan'- lr Y tity oflwater toV facilitate the passage of the Y material through apipe line to ashore or a -10V Y receiving scoW. Y

Furthermore it Willbe seen'` that by'reason ofthe specific configuration ofthe blades the material maybeeffectually `cuteven though it may behard andcornpact at the bottom of q the body of Water. HAlso therblades are so *placed in position upon the aXle and the disksas toV preclude the possibility of theV lsaid'blades Working loose or becoming de- Y y tached'while in operation. I Y I Y 1 Having described the invention what is claimed is A dredge cutter comprising an axle, disks carried by the axle and provided at their inner sides With recesses, blades mounted upon the disks and having cutting edges eX- tending transversely across the perpheries of the disks and side portions converging toward each other from the forward to the rear edges of the blades and having end portions snugly received in the recesses and securing devices passing transversely through the blades and disks.

In testimony whereof IfaflX my signature in presence of tWo Witnesses.

JAMES 'FISHBURN BROWN. Witnesses:

E. SYLER, H. LEIGHTBooD.

Y V(kipiesgof this patent may Vbe obtained for ve cents each, by addressing the Commissioner of Patents,

Y Washington, D. C. 

